Air-distributing box for stokers



A. VVATHEY.

AIR DISTRIBUTING BOX FOR STOKERS.

APPUCATIOH HLEnmAR.26,1921.

Patented June 13, 192.2.

2 SHEETS-SHEET l.

A. WATHEY.

AIR DISTRIBUTING BOX FOR STOKERS.

APPLICATION FILED III/IIII 2e, I92I.

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'Toallwhomz't concern; v Be it known that I, ARTHUR WArrmY, a

citizen "o'f the United States, residing at Cleveland, in the county of`Cuyahoga and State of Ohio, have inventedcertain new and BoxesforStokers, of which vthe following is a full,vclear, and exactspecification.

This invention relates to air distributing boxes for use in connectionwith furnace stokers of the forced'ainor twyer type.

' Experience has 'shown that :the air `distributing boxes used inconnection with such stokers quickly'burn out at` the points between thetwyers, making it necessary to tear down the brickwall above saidboxesin orderf'to renew the latter. The'tearing down of this wall,'therenewing of thefair distributing box, and the rebuilding *of said wall,whichis necessary about once a month when any of the form of boxes4heretofore I used, involves considerable expense, voften amounting toas much as $1200.00, asy well as necessitating the shutting down of thefurnace while the repair work is being done.

Itis the aim of the'present inventionto avoid these fre uentandvexpensive repairs to the air distri uting box, thereby greatlyreducing the cost of maintaining the fur' Ilace in running orderl andpermitting it to 'be almost .constantly operated with fewerinterruptions for such repairs. 'Io this end,

'the invention consists in forming the air distributing box withrenewable portions at the points between. the ducts leading to thetwyers where the burning out occurs, so that when said renewable'portions are burned out, they may be" quickly replaced by new portionsat comparatively'srnall expense. The invention will be first hereinafterdescribed in connection with' the accompanying drawings, whichconstitute part of this specification, and'v then more 'specificallydefined' in the clainrs at the end of the description.

Inv the accompanying drawings, wherein similar reference characters areused to ,designate corresponding parts "throughout lthe several viewszL'Figure 1 is a sectional view of a portion of a Stoker of the forcedair'or twyer type, showing the location of the air distributing boxtransversely to the upper ends of the twyers. l y p Figure 1a is a"fragmentary. plan view of the upper end portions of a plurality of thetwyers, showing their connections to the air .sembled,

Specification of ietters Patent.- Patented June L?, 1922.Applicationniea'maren 26, 1921.v

seria; No. 455,815.

.Smm-s 'P'aT`ElNr-QFFFICE v distributing box, the wall over said box beling omitted to show the latter.

Figure 2 is a broken rear-elevation of the i airdistributing boxA as itappears when as- --sembled with the renewable -portions thereof.useful.` Improvements in Air-Dlstributing' .Figure 3 isla top plan viewof one of the end sections of the air distributing box and one of theintermediate sections thereof assembled with the renewableportionsthereof, asslown 1n the right hand portion of F igure Figure 4is a rear elevation of one of the end sections ofthe air distributingbox and the adjacent intermediate section thereof asof Figure 2, butwith the renewable portions Figure is an end view vof -one of theinlgerm'ediate sectlons of the air distributing 0X.

las shown in the left hand portion Figure 6 is a section through one ofsaid I intermediate sections ofthe air distributing box taken verticallythrough one of the spaces for a renewable portion, the latter be-V ingremoved.

Figure 7 is a detailed end view of one of said renewable portions..igurev 8 is a rear elevation of the same,

Figure 9 is a plan view thereof.v

In Figure l, 1 designates a portion of a furnace grate, while 2indicates the reciprocating fuel pushers, 3 the fuel feeding wedges inthe fuel retorts alternating with the twyers or twyer boxes, and thetwyers of a forced air Stoker. As is well understood in this art, theforced. airis supplied to said twyers 4 by a distributing box 5 whichextends transversely above of the upper ends.

of said twyers and is located below the furnace wall. Said airdistributing box 5 is said sections isprovided with a longitudinal airpassage communicating with those of the vusually made in a plurality ofsections itadjacent sections, and also with one or more V downwardlyextending air ducts leadin to the twyersi. The front portions of thsections',l between said downwardly extending air ducts which lead tothe twyers, are

ese

the parts which quickly burn out asthey are subjected to the greatestheat.

` Asbest illustrated in Figures 2 vto- 9, inclusive, the intermediatesections of the air distributing box 5 and end `sections 50 of thepresent inventionihave the communicating longitudinally extendin airpassages 7, andthe downwardly exten ing air ducts 8 leading to thetwyers. The front portions or walls of said sections are cut away at 9between `said air ducts 8, and renewable portions or' plates 10 areprovided to fill in said cut-away portions 9, so that when saidl i timeand involves small expense as compared with the tearing down of the'entire wall when prior forms of air distributing boxes have to bereplaced, as hereinbefore explained.

The upper and y away portions 9 are formed with vertically extendingdove-tailed notches 11 into which corresponding dove-tailed tongues 12on thev renewable plates 10 are adapted to fit for retaining said platesin place, as best shown in Figures 2 and 3.A It will Abe noted inFigures 2, 3 and 4 that the cut-away portions 9 between the .downwardlyextending air ducts 8 of adjacent sections extend across the ends ofsaid sections, and that the plates l0 when fitted in said cut-awayportions also serve to interlock or eonnectthe sections by reason of thedove-tailed tongues 12 on said plates engaging the dove-tailed groovesl1 in the adjacent ends of said sections. The

plates l0 are preferably provided with airv discharging openings 13 atintervals throughout their length, and the integral rear portions of theair distributing box between said renewable plates 10 are alsopreferably perforated at 14 in a similar manner.

It has been found that the air distributing box, when made in accordancewith the present invention, with renewable portions or platesat thepointsindicated, will last for three or four years, saidplates beingreplaced at necessary intervals, whereas with any of the 'prior forms ofair distributing boxes, not having renewable portions on plates, it isnecessary to replace the entire box about once la month when theportions between the vertical air ducts burn out. The great saving intime and expense incident to the use of the present form of airdistributing box has been hereinbefore explained.

I claim:

` l. In an underfeed Stoker comprising a/ plurality of alternatelyarranged fuel retorts and twyer boxes, an air box arranged transverselyof said retorts and twyer boxes and above the same, and having ductslead- Y ing to' said twyer boxes, said air box comlower margins of thecutprising a plurality of sections arranged end to end and meeting abovethe retorts, there being removable wall portions of lsaid air boxarranged above the retorts and overlapping the meeting ends of saidsections.

2. In an underfeed Stoker comprising a plurality of alternately arrangedfuel retorts and twyer boxes, an air box arranged transversely of saidretorts and twyer boxes and above the same, and having ducts leading'tosaid twyer boxes, said air box comprising a plurality of sectionsarranged end to end and meeting above the retorts, there being removablewall portions of said air box arranged above the retorts and overlap ingthe meetin ends of said sections, said) removable wal portions havinginterloclging connections with said sections for the purposespecified.

In testimonywhereof I have signed my4 name'to this specification.

ARTHUR wA'rHEY.

